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SplDoublyLinkedList::valid

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SplDoublyLinkedList::valid — Check whether the doubly linked list contains more nodes

说明

public SplDoublyLinkedList::valid(): bool

Checks if the doubly linked list contains any more nodes.

参数

此函数没有参数。

返回值

Returns true if the doubly linked list contains any more nodes, false otherwise.